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Congenital multiple clustered dermatofibroma (MCDF) is a rare, idiopathic, benign tumor presenting at birth as an asymptomatic hyperpigmented patch that is stable until puberty, at which time it enlarges and develops papules. Ultimately, MCDF appears to follow a stable, benign course. We present a case of a 12-year-old girl with congenital MCDF. To our knowledge, this is only the third reported case of congenital presentation of MCDF and the only case featuring atrophoderma-like depression.

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Our case series serves as a reminder that dermatophytosis should be strongly considered in the differential diagnosis of lesions with PPDE. Fungal culture may be helpful in patients whose biopsies show PPDE, negative periodic acid-Schiff (PAS) stains and who fail to respond to conventional anti-inflammatory therapy. This study lends support for the routine use of PAS stains in biopsies of inflammatory dermatoses.